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ID 14217
file
creator
NDC
Physics
abstract
It is shown that interlayer spin-singlet Cooper pairing is induced by magnetic interactions in a metallic antiferromagnet of stacked conductive layers in which each layer is ferromagnetically polarized and they order antiferromagnetically in stacking direction. As a result, the antiferromagnetic long-range order and superconductivity coexist at low temperatures. It is shown that TAF>Tc except for in a very limited parameter region unless TAF=0, where TAF and Tc denote the antiferromagnetic and superconducting transition temperatures, respectively. It is found that the exchange field caused by the spontaneous staggered magnetization does not affect superconductivity at all, even if it is very large. The resultant superconducting order parameter has a horizontal line node, and is isotropic in spin space in spite of the anisotropy of the background magnetic order. We discuss the possible relevance of the present mechanism to the antiferromagnetic heavy fermion superconductors UPd2Al3 and CePt3Si.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 72
issue
Issue 13
start page
1
end page
7
date of issued
2005-10-01
publisher
American Physical Society
issn
1098-0121
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2000 The American Physical Society
relation is version of URL
http://dx.doi.org/10.1103/PhysRevB.61.R14936
department
Graduate School of Advanced Sciences of Matter